Transient acantholytic dermatosis [Grover]

This code represents a rare, self-limiting skin condition characterized by the sudden onset of itchy, small, red bumps and blisters, primarily on the trunk. Histologically, it involves acantholysis (loss of cohesion between epidermal cells) within the epidermis, resembling other acantholytic disorders. The condition is often triggered by heat, sweating, or sun exposure.

Assign this code when documentation explicitly states a diagnosis of transient acantholytic dermatosis, also known as Grover's disease. This diagnosis is typically made clinically and confirmed by skin biopsy showing characteristic acantholysis. It is appropriate for both initial and subsequent encounters related to the management of this specific dermatosis.

• Ensure the documentation clearly distinguishes this condition from other acantholytic disorders like pemphigus or Darier's disease.
• Do not confuse with other papulovesicular eruptions without documented acantholysis.
• Consider coding associated symptoms (e.g., pruritus, R23.8) if they are significant and not inherent to the diagnosis.